diff --git a/pkgs/tools/graphics/rocket/default.nix b/pkgs/tools/graphics/rocket/default.nix
index 97c400fbc9e..683a2c73f45 100644
--- a/pkgs/tools/graphics/rocket/default.nix
+++ b/pkgs/tools/graphics/rocket/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchFromGitHub, qmake, qtbase }:
+{ mkDerivation, stdenv, fetchFromGitHub, qmake, qtbase }:
 
-stdenv.mkDerivation {
+mkDerivation {
   pname = "rocket";
   version = "2018-06-09";